DVD Lab Pro 2 Help

I am trying to author using DVD Lab Pro 2. What I would like to happen is for when the dvd is first inserted for it to play a motion menu with music. when it reaches the end of the motion, buttons are to appear. The music is longer than the motion menu, but I want the music to continue until either a button is selected, or for it to loop when it comes to the end, but since it is a different length than the menu I have been having difficulties with this. I have tried using different cells for my buttons to appear on, but then the music follows what that cell does instead of being independent from it.

Any help greatly appreciated, or is there a different program I should be using?